SNClient

Changes:

- catch some standard cmd.exe errors
- skip logrotation if output is not a file
- make filter keywords are case insensitive
- improve scripts paths containing spaces
- add /api/v1/inventory rest path
- packaging: create logfile folder
- fix restart after running update from cli

Changes:

 - add support for perf-config option
 - add support for case insensitive regular expression matches
 - add support for case insensitive string matches
 - add support for builtin check_nsc_web
 - improve documentation
 - check_disk: ignore drives which have problems but are not required

Changes:

 - relative include paths are now considered to be in the parent ini-file
 - wmi: improve error handling